1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba177e8bc291d935c0262292f3a84ad6bec57a523e1a747e7eff620f25a4f56. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78db9360-5eab-4f7e-9659-c7155f909f27.json and https://artists.proofprofile.net/proofs/artist/78db9360-5eab-4f7e-9659-c7155f909f27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668dcf49912f26b05de422db570301f2a4652adf73736e3040ddc22714134a3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62345214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b7c1543a9dba91e9d30fd4bd51a2dbcf616bda33b9ef8b654cc76eea9d95b1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2358999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb109061f35b8feed1a5ebe8a000ab447b9c1908620dd95c1f4a62cb08c12c72b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFH2413204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2d342aaa76ac943c67fb09d9993a202485093825a0ce730d027f56f55eb9af. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2460170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56d0e3765f92315e802ca82e1524434601f98880466f82ef53ceb9f762ceb8a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFE2454846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06730a74b99f9e334a648ed1c78bb732a7d6b351fb557d6a6ea75f5a2fa79113. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFW2422787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c9b10c5f6534369f4938c148fdd101626e8e97e898e8e5eab49396e8f548e6. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFW2422789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a6291e1faee63adff8718ef2a52ad89b90a6ed8f6b6c9055660efb35745a2f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42568630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9b66f2face0c45b7475a3521dddae3fbadce0ebd1f3af7ce9bb59ba5d33d0b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62534362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9b66f2face0c45b7475a3521dddae3fbadce0ebd1f3af7ce9bb59ba5d33d0b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62534362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a6291e1faee63adff8718ef2a52ad89b90a6ed8f6b6c9055660efb35745a2f. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42568630.